Morris County, New Jersey · For builders and owners

What can you build in Mendham?

The single-family zoning rules in Mendham, zone by zone, read from the town ordinance by our builder desk. Then check any address to see what fits on that lot.

Single-Family Zones

Borough of Mendham zoning, zone by zone.

ZoneMin lot (sq ft)Min widthFrontSide (each / total)RearBldg coverageHeightFAR
5-Acre
5-Acre Residence Zone		45 ft
3-Acre
3-Acre Residence Zone		45 ft
1-Acre
1-Acre Residence Zone		40 ft
1/2-Acre
1/2-Acre Residence Zone		40 ft

Source: Chapter 215 Zoning, Article X Lot Area and Bulk Requirements (Schedule I Height and Area of Improvements; Schedule II Minimum Building Setbacks), §215-31.1 last amended 9-23-2024 by Ord. No. 15-2024. Read 2026-09-28. Only zones we could confirm from the ordinance are shown. Rules change and have exceptions (corner lots, undersized lots, steep slopes, overlays), so confirm with the town zoning officer before you buy or design.

Single-Family Zones

Township of Mendham zoning, zone by zone.

ZoneMin lot (sq ft)Min widthFrontSide (each / total)RearBldg coverageHeightFAR
R
R One Family Residence District		20,000
R-10
R-10 One Family Residence District		435,600
CR-1
CR-1 Combination Residential District		35,00035 ft
CR-2
CR-2 Combination Residential District
R-C
Residential Cluster District (Block 127, Lot 69)		50 ft30 ft

Source: Chapter 500 Zoning (Schedule of Requirements on Zoning Map attachment). Read 2026-09-28. Only zones we could confirm from the ordinance are shown. Rules change and have exceptions (corner lots, undersized lots, steep slopes, overlays), so confirm with the town zoning officer before you buy or design.

What Builders Build Here

What the market pays for new homes in Mendham.

Zoning tells you what you are allowed to build. These numbers tell you what sells.

0teardowns since 2019older homes and lots bought by builders
n/amedian builder paidfor the old house and lot
4,199median new home, sq ftnew homes sold, last 2 years
$1.27Mmedian new home price19 sold, last 2 years

Check A Lot

Check any Mendham address.

Enter an address and we will show the lot size, its zone, roughly how big a new home could be, and how likely a builder is to want it.

Check a lot in MendhamFree, instant, from the state parcel map and this ordinance.Get our full read on a parcelZoning, density, subdivision, what it will sell for and how fast.Builder deal sheetMonthly: teardown and land opportunities in the towns you build in.
Michelle C Nieves

Written and reviewed by

Michelle C Nieves

REALTOR-Associate, New Development Advisor, Builders Resource Center at Corcoran Sawyer Smith. Advises builders and owners in Mendham. Numbers updated September 2026.

About Michelle · (646) 251-8176

Keep Exploring

More on Mendham.

Selling a home in MendhamWhat homes sold for, what a builder might pay, and a free price estimate.Moving to MendhamWhat your budget buys, how old the homes are, and what is for sale now.
Mendham market reportEvery home sold, median prices and the agent who knows the town.New construction in MendhamRecent new-home sales, sizes and price per square foot.What can you build on your lot?Enter an address: zoning, lot size and roughly how big a new home could be.